Eddy current retarder for use in emergency escape as from higher

Fire escape – ladder – or scaffold – With storage device for supple escape – Reel

Patent

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Details

182231, A62B 110

Patent

active

045679630

ABSTRACT:
A device utilizing energy conversion into heat by eddy currents for braking the descent of a refugee as from higher stories of a building in the event of a fire or other emergency. Included is a payoff reel rotatably mounted on a frame for paying off wire rope. The payoff reel is coupled via overdrive gears to a rotor of electrically conductive material which also is rotatably mounted on the frame and which rotates at a greatly increased speed in response to the rotation of the payoff reel. A permanent magnet or magnets of generally annular configuration are secured to the frame in an opposed relation to the rotor for inducing eddy currents therein upon rotation of the payoff reel. The induced eddy currents convert the energy of the revolving payoff reel into heat.

REFERENCES:
patent: 197899 (1877-12-01), Root
patent: 1167239 (1916-01-01), Winkler
patent: 1647506 (1927-11-01), Coughtry
patent: 3423614 (1969-01-01), Poteate
patent: 4434951 (1984-03-01), Nakajima
patent: 4469196 (1984-09-01), Sadler

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